tiny.choir.backends.regalloc.verify
Defined in backends.regalloc.
API (2)
Actions
Public operations.
Types and contracts
Public types and contracts.
Source
Source: lib/choir/src/backends/regalloc/root.zig:6
zig
pub const verify = @import("verify.zig");Source: lib/choir/src/backends/regalloc/verify.zig
zig
const std = @import("std");const alloc_phase = @import("alloc_phase");const ir = @import("../../core/root.zig");const interval = @import("interval.zig");const position = @import("position.zig");const range = @import("range.zig");const Allocator = std.mem.Allocator;pub const Error = error{ InvalidAllocation,};const CapacityError = error{ CapacityOverflow,};const CandidateIndex = struct { value: *ir.Value, index: usize,};fn candidateIndexLessThan(_: void, lhs: CandidateIndex, rhs: CandidateIndex) bool { return @intFromPtr(lhs.value) < @intFromPtr(rhs.value);}fn candidateIndexOrder(value: *ir.Value, entry: CandidateIndex) std.math.Order { return std.math.order(@intFromPtr(value), @intFromPtr(entry.value));}fn valueLocationRangeOrder(comptime Register: type) type { const Range = range.ValueLocationRange(Register); return struct { fn lessThan(_: void, lhs: Range, rhs: Range) bool { const register_order = switch (@typeInfo(Register)) { .@"enum" => std.math.order(@backingInt(lhs.reg), @backingInt(rhs.reg)), .int => std.math.order(lhs.reg, rhs.reg), else => @compileError("register type must be an integer or enum"), }; if (register_order != .eq) return register_order == .lt; const lhs_start = lhs.startPoint().rank(); const rhs_start = rhs.startPoint().rank(); if (lhs_start != rhs_start) return lhs_start < rhs_start; if (lhs.end != rhs.end) return lhs.end < rhs.end; return @backingInt(lhs.end_phase) < @backingInt(rhs.end_phase); } };}fn VerificationLimits(comptime Register: type, comptime Mask: type) type { return struct { ranges: []const range.ValueLocationRange(Register), candidates: []const interval.Candidate(Register, Mask), fixed_positions: interval.FixedPositionIndex(Register), };}fn VerificationCapacity(comptime Register: type, comptime Mask: type) type { const Limits = VerificationLimits(Register, Mask); const Range = range.ValueLocationRange(Register); return struct { candidate_count: usize, range_count: usize, candidate_index_bytes: usize, ordered_range_bytes: usize, working_bytes: usize, const Self = @This(); pub fn derive(limits: Limits) CapacityError!Self { return deriveCounts(limits.candidates.len, limits.ranges.len); } fn deriveCounts(candidate_count: usize, range_count: usize) CapacityError!Self { const candidate_index_bytes = std.math.mul( usize, candidate_count, @sizeOf(CandidateIndex), ) catch return error.CapacityOverflow; const ordered_range_bytes = std.math.mul( usize, range_count, @sizeOf(Range), ) catch return error.CapacityOverflow; const working_bytes = std.math.add( usize, candidate_index_bytes, ordered_range_bytes, ) catch return error.CapacityOverflow; return .{ .candidate_count = candidate_count, .range_count = range_count, .candidate_index_bytes = candidate_index_bytes, .ordered_range_bytes = ordered_range_bytes, .working_bytes = working_bytes, }; } };}fn verifyOrderedRangeInterference( comptime Register: type, ordered: []const range.ValueLocationRange(Register),) Error!void { const Range = range.ValueLocationRange(Register); var active: ?Range = null; for (ordered) |entry| { std.debug.assert(entry.start < entry.end); const current = active orelse { active = entry; continue; }; if (current.reg != entry.reg) { active = entry; continue; } const overlaps = current.endPoint().rank() >= entry.startPoint().rank(); if (overlaps and current.value != entry.value) return error.InvalidAllocation; if (!overlaps or current.endPoint().rank() < entry.endPoint().rank()) active = entry; }}fn initAllocationVerifier( comptime Register: type, comptime Mask: type, comptime Owner: type, allocator: Allocator, limits: Owner.Limits,) !Owner { const Range = range.ValueLocationRange(Register); const capacity = try Owner.Capacity.derive(limits); const candidate_indices = try allocator.alloc( CandidateIndex, capacity.candidate_count, ); errdefer allocator.free(candidate_indices); for (limits.candidates, 0..) |candidate, index| { candidate_indices[index] = .{ .value = candidate.value, .index = index }; } std.sort.heap(CandidateIndex, candidate_indices, {}, candidateIndexLessThan); const ordered_ranges = try allocator.dupe(Range, limits.ranges); errdefer allocator.free(ordered_ranges); std.sort.heap( Range, ordered_ranges, {}, valueLocationRangeOrder(Register).lessThan, ); std.debug.assert(candidate_indices.len == capacity.candidate_count); std.debug.assert(ordered_ranges.len == capacity.range_count); _ = Mask; return .{ .phase = .initialization, .capacity = capacity, .candidate_indices = candidate_indices, .ordered_ranges = ordered_ranges, .candidates = limits.candidates, .fixed_positions = limits.fixed_positions, };}fn activateAllocationVerifier(comptime Owner: type, self: *Owner) error{AlreadyActive}!void { if (self.phase != .initialization) return error.AlreadyActive; self.phase = .steady;}fn deinitAllocationVerifier(comptime Owner: type, self: *Owner, allocator: Allocator) void { if (self.phase == .teardown) { @panic("allocation verifier teardown is terminal"); } self.phase = .teardown; allocator.free(self.ordered_ranges); allocator.free(self.candidate_indices); self.ordered_ranges = undefined; self.candidate_indices = undefined;}fn candidateForValue( comptime Register: type, comptime Mask: type, comptime Owner: type, self: *const Owner, value: *ir.Value,) ?interval.Candidate(Register, Mask) { const candidate_index = std.sort.binarySearch( CandidateIndex, self.candidate_indices, value, candidateIndexOrder, ) orelse return null; return self.candidates[self.candidate_indices[candidate_index].index];}fn verifyCandidateIndex(comptime Owner: type, self: *const Owner) Error!void { if (self.candidate_indices.len < 2) return; for ( self.candidate_indices[1..], self.candidate_indices[0 .. self.candidate_indices.len - 1], ) |current, previous| { if (current.value == previous.value) return error.InvalidAllocation; }}fn verifyRangeCandidates( comptime Register: type, comptime Mask: type, comptime Owner: type, self: *const Owner,) Error!void { for (self.ordered_ranges) |entry| { if (entry.start >= entry.end) return error.InvalidAllocation; if (entry.startPoint().rank() > entry.endPoint().rank()) { return error.InvalidAllocation; } const candidate = candidateForValue(Register, Mask, Owner, self, entry.value) orelse return error.InvalidAllocation; if (!candidate.containsPoint(entry.startPoint())) return error.InvalidAllocation; if (!candidate.containsPoint(entry.endPoint())) return error.InvalidAllocation; }}fn verifyFixedPositions( comptime Register: type, comptime Mask: type, comptime Owner: type, self: *const Owner,) Error!void { for (self.ordered_ranges) |entry| { const candidate = candidateForValue(Register, Mask, Owner, self, entry.value) orelse return error.InvalidAllocation; for (self.fixed_positions.between( entry.reg, entry.startPoint(), entry.endPoint(), )) |fixed| { switch (fixed.kind) { .source, .use => continue, .scratch_use, .def, .clobber => {}, } if (!candidate.ownsFixedPosition(fixed)) return error.InvalidAllocation; } }}fn verifyAllocationVerifier( comptime Register: type, comptime Mask: type, comptime Owner: type, self: *const Owner,) Error!void { if (self.phase != .steady) { @panic("allocation verifier used outside its steady phase"); } std.debug.assert(self.candidate_indices.len == self.capacity.candidate_count); std.debug.assert(self.ordered_ranges.len == self.capacity.range_count); try verifyCandidateIndex(Owner, self); try verifyRangeCandidates(Register, Mask, Owner, self); try verifyOrderedRangeInterference(Register, self.ordered_ranges); try verifyFixedPositions(Register, Mask, Owner, self);}fn allocationVerifierType(comptime Register: type, comptime Mask: type) type { const Candidate = interval.Candidate(Register, Mask); const CapacityType = VerificationCapacity(Register, Mask); const FixedPositionIndex = interval.FixedPositionIndex(Register); const LimitsType = VerificationLimits(Register, Mask); const Range = range.ValueLocationRange(Register); return struct { pub const claim: alloc_phase.capacity.Declaration = .{ .source = .{ .id = "choir.allocation_verifier", .kind = .phase_static, .limit_source = .caller, .storage = .{ .covered = &.{ .{ .id = "sorted_candidateindex_entries_and_duplicated_ordere_0d17418499cc", .lifetime = .steady, .detail = "sorted CandidateIndex entries and duplicated ordered Range entries", }, }, .excluded = &.{ "borrowed candidate records and use-position backing", "borrowed fixed-position records and register spans", "borrowed IR Value pointees and target emitter output", }, }, .capacity = .{ .inputs = &.{}, .type_selectors = &.{}, .nodes = &.{ .{ .constant = 0 }, }, .assertions = &.{.{ .scope = .closure_total, .measure = .retained, .relation = .exact, .expression = 0, }}, }, .overload = .{ .kind = .reject_before_seal, .detail = "capacity overflow or OOM rejects before steady verification; invalid allocations remain an explicit steady semantic error, and no steady exhaustion exists", }, .risks = .{ .transitive = .{ .status = .open, .detail = "the source-reviewed helper chain is clean but current tooling cannot close comptime generic calls and std binary search", }, .foreign = .{ .status = .open, .detail = "no foreign edge is visible in the reviewed sources, but the transitive machine certificate is incomplete", }, }, .obligations = &.{ .{ .key = "verifier_capacity_capacity_model", .role = .capacity_model }, .{ .key = "verifier_capacity_overload", .role = .overload }, .{ .key = "verifier_oom_retry", .role = .overload }, .{ .key = "verifier_sealed_valid_transitive_risk", .role = .transitive_risk }, .{ .key = "verifier_sealed_valid_foreign_risk", .role = .foreign_risk }, .{ .key = "verifier_sealed_invalid_overload", .role = .overload }, .{ .key = "verifier_sealed_invalid_transitive_risk", .role = .transitive_risk }, }, }, .bindings = .{ .owner = @This(), .seal = .{ .family = alloc_phase.capacity.selector(@This().activate), .premise = .{ .class = .checked_semantic_fact, .authority = .checker, }, }, .teardown = .{ .family = alloc_phase.capacity.selector(@This().deinit), .premise = .{ .class = .checked_semantic_fact, .authority = .checker, }, }, }, }; phase: alloc_phase.capacity.Phase, capacity: Capacity, candidate_indices: []CandidateIndex, ordered_ranges: []Range, candidates: []const Candidate, fixed_positions: FixedPositionIndex, pub const Limits: type = LimitsType; pub const Capacity: type = CapacityType; const Self = @This(); pub fn init(allocator: Allocator, limits: Limits) !Self { return initAllocationVerifier(Register, Mask, Self, allocator, limits); } pub fn activate(self: *Self) error{AlreadyActive}!void { return activateAllocationVerifier(Self, self); } pub fn verify(self: *const Self) Error!void { return verifyAllocationVerifier(Register, Mask, Self, self); } pub fn deinit(self: *Self, allocator: Allocator) void { deinitAllocationVerifier(Self, self, allocator); } };}pub fn AllocationVerifier(comptime Register: type, comptime Mask: type) type { const Verifier = allocationVerifierType(Register, Mask); comptime alloc_phase.capacity.requireAllocatorExactOwnerShape(Verifier); return Verifier;}const TestVerifier = AllocationVerifier(u8, u8);const TestCandidate = interval.Candidate(u8, u8);const TestRange = range.ValueLocationRange(u8);const VerificationFixture = struct { owner: u8, values: [2]ir.Value, candidates: [2]TestCandidate, ranges: [3]TestRange, fn init(self: *@This()) void { self.owner = 0; self.values = .{ .{ .kind = .{ .op_result = .{ .owner = &self.owner, .result_number = 0 } }, .type = undefined, .id = 0, }, .{ .kind = .{ .op_result = .{ .owner = &self.owner, .result_number = 1 } }, .type = undefined, .id = 1, }, }; self.candidates = .{ .{ .value = &self.values[0], .range = .{ .start = 0, .end = 2, .end_phase = .definition }, .use_positions = .empty, .definition = .{ .point = position.Point.definition(0), .requirement = .any, .source = .any, }, .order = 0, .is_constant = false, }, .{ .value = &self.values[1], .range = .{ .start = 1, .end = 3, .end_phase = .definition }, .use_positions = .empty, .definition = .{ .point = position.Point.definition(1), .requirement = .any, .source = .any, }, .order = 1, .is_constant = false, }, }; self.ranges = .{ .{ .value = &self.values[1], .start = 2, .end = 3, .reg = 1 }, .{ .value = &self.values[0], .start = 0, .end = 2, .reg = 1, .end_phase = .source, }, .{ .value = &self.values[1], .start = 1, .end = 4, .reg = 1 }, }; } fn limits(self: *const @This()) TestVerifier.Limits { return .{ .ranges = &self.ranges, .candidates = &self.candidates, .fixed_positions = interval.FixedPositionIndex(u8).empty(), }; }};const VerifierSnapshot = struct { phase: alloc_phase.capacity.Phase, capacity: TestVerifier.Capacity, candidate_indices_pointer: [*]CandidateIndex, candidate_indices_length: usize, ordered_ranges_pointer: [*]TestRange, ordered_ranges_length: usize,};fn verifierSnapshot(verifier: *const TestVerifier) VerifierSnapshot { return .{ .phase = verifier.phase, .capacity = verifier.capacity, .candidate_indices_pointer = verifier.candidate_indices.ptr, .candidate_indices_length = verifier.candidate_indices.len, .ordered_ranges_pointer = verifier.ordered_ranges.ptr, .ordered_ranges_length = verifier.ordered_ranges.len, };}fn checkVerifierInitAllocationFailures( allocator: Allocator, limits: TestVerifier.Limits,) !void { var verifier = try TestVerifier.init(allocator, limits); defer verifier.deinit(allocator); try std.testing.expectEqual(alloc_phase.capacity.Phase.initialization, verifier.phase);}fn verifyTestAllocation( ranges: []const range.ValueLocationRange(u8), candidates: []const interval.Candidate(u8, u8), fixed_positions: interval.FixedPositionIndex(u8),) !void { var verifier = try TestVerifier.init(std.testing.allocator, .{ .ranges = ranges, .candidates = candidates, .fixed_positions = fixed_positions, }); defer verifier.deinit(std.testing.allocator); try verifier.activate(); try verifier.verify();}fn verifyTestInterference(ranges: []range.ValueLocationRange(u8)) Error!void { std.sort.heap( range.ValueLocationRange(u8), ranges, {}, valueLocationRangeOrder(u8).lessThan, ); try verifyOrderedRangeInterference(u8, ranges);}test "allocation verifier derives exact typed working capacity" { comptime { @stardustClaim( @import("alloc_phase").capacity.witness(TestVerifier, "verifier_capacity_capacity_model"), null, null, null, null, null, null, ); } comptime { @stardustClaim( @import("alloc_phase").capacity.witness(TestVerifier, "verifier_capacity_overload"), null, null, null, null, null, null, ); } for (0..9) |candidate_count| { for (0..9) |range_count| { const capacity = try TestVerifier.Capacity.deriveCounts( candidate_count, range_count, ); const candidate_bytes = candidate_count * @sizeOf(CandidateIndex); const range_bytes = range_count * @sizeOf(TestRange); try std.testing.expectEqual(candidate_count, capacity.candidate_count); try std.testing.expectEqual(range_count, capacity.range_count); try std.testing.expectEqual(candidate_bytes, capacity.candidate_index_bytes); try std.testing.expectEqual(range_bytes, capacity.ordered_range_bytes); try std.testing.expectEqual(candidate_bytes + range_bytes, capacity.working_bytes); } } const maximum = std.math.maxInt(usize); try std.testing.expectError( error.CapacityOverflow, TestVerifier.Capacity.deriveCounts(maximum / @sizeOf(CandidateIndex) + 1, 0), ); try std.testing.expectError( error.CapacityOverflow, TestVerifier.Capacity.deriveCounts(0, maximum / @sizeOf(TestRange) + 1), ); try std.testing.expectError( error.CapacityOverflow, TestVerifier.Capacity.deriveCounts(maximum / @sizeOf(CandidateIndex), 1), );}test "allocation verifier accepts an empty exact job" { var verifier = try TestVerifier.init(std.testing.allocator, .{ .ranges = &.{}, .candidates = &.{}, .fixed_positions = interval.FixedPositionIndex(u8).empty(), }); defer verifier.deinit(std.testing.allocator); try verifier.activate(); try verifier.verify(); try std.testing.expectEqual(@as(usize, 0), verifier.capacity.working_bytes);}test "allocation verifier initialization is retryable after every allocation failure" { comptime { @stardustClaim( @import("alloc_phase").capacity.witness(TestVerifier, "verifier_oom_retry"), null, null, null, null, null, null, ); } var fixture: VerificationFixture = undefined; fixture.init(); try std.testing.checkAllAllocationFailures( std.testing.allocator, checkVerifierInitAllocationFailures, .{fixture.limits()}, ); var verifier = try TestVerifier.init(std.testing.allocator, fixture.limits()); defer verifier.deinit(std.testing.allocator); try verifier.activate(); try verifier.verify();}test "allocation verifier rejects duplicate and empty semantic input after activation" { var fixture: VerificationFixture = undefined; fixture.init(); fixture.candidates[1].value = fixture.candidates[0].value; try std.testing.expectError( error.InvalidAllocation, verifyTestAllocation( &fixture.ranges, &fixture.candidates, interval.FixedPositionIndex(u8).empty(), ), ); fixture.init(); fixture.ranges[0].end = fixture.ranges[0].start; try std.testing.expectError( error.InvalidAllocation, verifyTestAllocation( &fixture.ranges, &fixture.candidates, interval.FixedPositionIndex(u8).empty(), ), ); fixture.init(); fixture.ranges[0] = .{ .value = &fixture.values[0], .start = 1, .end = 2, .reg = 2, .end_phase = .source, }; try std.testing.expectError( error.InvalidAllocation, verifyTestAllocation( &fixture.ranges, &fixture.candidates, interval.FixedPositionIndex(u8).empty(), ), );}test "allocation verifier is sealed before its first valid verification" { comptime { @stardustClaim( @import("alloc_phase").capacity.witness(TestVerifier, "verifier_sealed_valid_transitive_risk"), null, null, null, null, null, null, ); } comptime { @stardustClaim( @import("alloc_phase").capacity.witness(TestVerifier, "verifier_sealed_valid_foreign_risk"), null, null, null, null, null, null, ); } var fixture: VerificationFixture = undefined; fixture.init(); const candidates_before = fixture.candidates; const ranges_before = fixture.ranges; var phase_allocator = try alloc_phase.SealedPhaseAllocator.init(std.testing.allocator); var maybe_verifier: ?TestVerifier = null; errdefer { if (phase_allocator.phase() == .initialization) { phase_allocator.abortInitialization(); } if (phase_allocator.phase() == .steady) phase_allocator.beginTeardown(); if (maybe_verifier) |*verifier| { if (verifier.phase != .teardown) { verifier.deinit(phase_allocator.teardownAllocator()); } } if (phase_allocator.phase() == .teardown) phase_allocator.deinit(); } maybe_verifier = try TestVerifier.init( phase_allocator.initializationAllocator(), fixture.limits(), ); const verifier = &maybe_verifier.?; const initialized = verifierSnapshot(verifier); try std.testing.expectEqual(alloc_phase.capacity.Phase.initialization, initialized.phase); try std.testing.expectEqual(@as(usize, 2), initialized.capacity.candidate_count); try std.testing.expectEqual(@as(usize, 3), initialized.capacity.range_count); phase_allocator.seal(); try verifier.activate(); try verifier.verify(); try verifier.verify(); const verified = verifierSnapshot(verifier); try std.testing.expectEqual(alloc_phase.capacity.Phase.steady, verified.phase); try std.testing.expectEqual(initialized.capacity, verified.capacity); try std.testing.expectEqual( initialized.candidate_indices_pointer, verified.candidate_indices_pointer, ); try std.testing.expectEqual( initialized.candidate_indices_length, verified.candidate_indices_length, ); try std.testing.expectEqual( initialized.ordered_ranges_pointer, verified.ordered_ranges_pointer, ); try std.testing.expectEqual( initialized.ordered_ranges_length, verified.ordered_ranges_length, ); try std.testing.expectEqual(candidates_before, fixture.candidates); try std.testing.expectEqual(ranges_before, fixture.ranges); try std.testing.expectEqual(alloc_phase.PhaseViolations{}, phase_allocator.violations()); phase_allocator.beginTeardown(); verifier.deinit(phase_allocator.teardownAllocator()); try std.testing.expectEqual(alloc_phase.capacity.Phase.teardown, verifier.phase); try std.testing.expectEqual(alloc_phase.PhaseViolations{}, phase_allocator.violations()); phase_allocator.deinit();}test "allocation verifier is sealed before its first invalid verification" { comptime { @stardustClaim( @import("alloc_phase").capacity.witness(TestVerifier, "verifier_sealed_invalid_overload"), null, null, null, null, null, null, ); } comptime { @stardustClaim( @import("alloc_phase").capacity.witness(TestVerifier, "verifier_sealed_invalid_transitive_risk"), null, null, null, null, null, null, ); } var fixture: VerificationFixture = undefined; fixture.init(); fixture.ranges[1].end_phase = .definition; var phase_allocator = try alloc_phase.SealedPhaseAllocator.init(std.testing.allocator); var maybe_verifier: ?TestVerifier = null; errdefer { if (phase_allocator.phase() == .initialization) { phase_allocator.abortInitialization(); } if (phase_allocator.phase() == .steady) phase_allocator.beginTeardown(); if (maybe_verifier) |*verifier| { if (verifier.phase != .teardown) { verifier.deinit(phase_allocator.teardownAllocator()); } } if (phase_allocator.phase() == .teardown) phase_allocator.deinit(); } maybe_verifier = try TestVerifier.init( phase_allocator.initializationAllocator(), fixture.limits(), ); const verifier = &maybe_verifier.?; const initialized = verifierSnapshot(verifier); phase_allocator.seal(); try verifier.activate(); try std.testing.expectError(error.InvalidAllocation, verifier.verify()); try std.testing.expectEqual(initialized.capacity, verifier.capacity); try std.testing.expectEqual( initialized.candidate_indices_pointer, verifier.candidate_indices.ptr, ); try std.testing.expectEqual( initialized.candidate_indices_length, verifier.candidate_indices.len, ); try std.testing.expectEqual(initialized.ordered_ranges_pointer, verifier.ordered_ranges.ptr); try std.testing.expectEqual(initialized.ordered_ranges_length, verifier.ordered_ranges.len); try std.testing.expectEqual(alloc_phase.PhaseViolations{}, phase_allocator.violations()); phase_allocator.beginTeardown(); verifier.deinit(phase_allocator.teardownAllocator()); try std.testing.expectEqual(alloc_phase.PhaseViolations{}, phase_allocator.violations()); phase_allocator.deinit();}test "allocation verifier rejects ranges without candidate ownership" { var owner: u8 = 0; var value = ir.Value{ .kind = .{ .op_result = .{ .owner = &owner, .result_number = 0 } }, .type = undefined, .id = 0, }; const Range = range.ValueLocationRange(u8); const ranges = [_]Range{.{ .value = &value, .start = 1, .end = 2, .reg = 1, }}; try std.testing.expectError( error.InvalidAllocation, verifyTestAllocation(&ranges, &.{}, interval.FixedPositionIndex(u8).empty()), );}test "allocation verifier rejects ranges outside candidate intervals" { var owner: u8 = 0; var value = ir.Value{ .kind = .{ .op_result = .{ .owner = &owner, .result_number = 0 } }, .type = undefined, .id = 0, }; const Candidate = interval.Candidate(u8, u8); const Range = range.ValueLocationRange(u8); const candidates = [_]Candidate{.{ .value = &value, .range = .{ .start = 1, .end = 1, .end_phase = .definition }, .use_positions = .empty, .definition = .{ .point = position.Point.definition(1), .requirement = .any, .source = .any, }, .order = 0, .is_constant = false, }}; const ranges = [_]Range{.{ .value = &value, .start = 0, .end = 2, .reg = 1, }}; try std.testing.expectError( error.InvalidAllocation, verifyTestAllocation( &ranges, &candidates, interval.FixedPositionIndex(u8).empty(), ), );}test "allocation verifier accepts owned noninterfering ranges" { var owner: u8 = 0; var value = ir.Value{ .kind = .{ .op_result = .{ .owner = &owner, .result_number = 0 } }, .type = undefined, .id = 0, }; var other = ir.Value{ .kind = .{ .op_result = .{ .owner = &owner, .result_number = 1 } }, .type = undefined, .id = 1, }; const Candidate = interval.Candidate(u8, u8); const Range = range.ValueLocationRange(u8); const candidates = [_]Candidate{ .{ .value = &value, .range = .{ .start = 1, .end = 1, .end_phase = .definition }, .use_positions = .empty, .definition = .{ .point = position.Point.definition(1), .requirement = .any, .source = .any, }, .order = 0, .is_constant = false, }, .{ .value = &other, .range = .{ .start = 2, .end = 2, .end_phase = .definition }, .use_positions = .empty, .definition = .{ .point = position.Point.definition(2), .requirement = .any, .source = .any, }, .order = 1, .is_constant = false, }, }; const ranges = [_]Range{ .{ .value = &value, .start = 1, .end = 2, .reg = 1, }, .{ .value = &other, .start = 2, .end = 3, .reg = 1, }, }; try verifyTestAllocation( &ranges, &candidates, interval.FixedPositionIndex(u8).empty(), );}test "interference verifier retains the widest same-value range" { var owner: u8 = 0; var value = ir.Value{ .kind = .{ .op_result = .{ .owner = &owner, .result_number = 0 } }, .type = undefined, .id = 0, }; var other = ir.Value{ .kind = .{ .op_result = .{ .owner = &owner, .result_number = 1 } }, .type = undefined, .id = 1, }; const Range = range.ValueLocationRange(u8); var ranges = [_]Range{ .{ .value = &other, .start = 4, .end = 5, .reg = 1 }, .{ .value = &other, .start = 1, .end = 7, .reg = 2 }, .{ .value = &value, .start = 2, .end = 3, .reg = 1 }, .{ .value = &value, .start = 1, .end = 8, .reg = 1 }, }; try std.testing.expectError( error.InvalidAllocation, verifyTestInterference(&ranges), );}test "interference verifier permits overlapping ranges for one value" { var owner: u8 = 0; var value = ir.Value{ .kind = .{ .op_result = .{ .owner = &owner, .result_number = 0 } }, .type = undefined, .id = 0, }; var other = ir.Value{ .kind = .{ .op_result = .{ .owner = &owner, .result_number = 1 } }, .type = undefined, .id = 1, }; const Range = range.ValueLocationRange(u8); var ranges = [_]Range{ .{ .value = &value, .start = 5, .end = 9, .reg = 1 }, .{ .value = &other, .start = 5, .end = 9, .reg = 2 }, .{ .value = &value, .start = 1, .end = 8, .reg = 1 }, }; try verifyTestInterference(&ranges);}Audit
| Definitions | 3 |
|---|---|
| Public names | 4 |
| Members | 1 |
| Version | 26.7.0 |
| Revision | daab053ee433 |